1 plant 250 hps in a locker, 4 gal res dwc.... Let me first say this is my 3rd grow ever and I finally have everything running almost perfect. Its my 23rd day of flower doing reserva privada purple wreck fem and I'm starting to notice salt build up in the res. I'm currently at about 40% nutes using general hydroponics. Should I flush just to get rid of the salt build up before it might turn into a problem ?? Like I said though so far I would rate this grow an 95/100. I don't have one discolored leave, everything green, not dropy, nothing. So far perfect.